Hi,new to the forum. I recently purchased a 91 new Holland l555 it has a Perkins diesel motor. When it warm up it doesn’t want to pick up a lot of weight, I’m assuming it’s probly the pump? Is there any one that rebuilds these pumps,all I can find online are reman pumps so assuming someone can rebuild them.This machine has also been sitting a couple years ,what else so I go Thur on this machine?This is very first loader I have had and I got it for doing a little work so I can afford to put a little money in in.